Inorganic electrochromic device and display device

The invention provides an inorganic electrochromic device and a display device.The inorganic electrochromic device comprises a first substrate, a second substrate and an electrolyte layer which are oppositely arranged, and the first substrate comprises a first substrate, a driving circuit layer, an insulating layer, a pixel electrode layer and an electrochromic layer which are arranged in a stacked mode; the electrochromism layer comprises a first electrochromism layer, a second electrochromism layer and a third electrochromism layer which are different in thickness, the first electrochromism layer reflects red light to form red sub-pixels, the second electrochromism layer reflects green light to form green sub-pixels, and the third electrochromism layer reflects blue light to form blue sub-pixels; the second substrate comprises a second substrate, a common electrode layer and an electrochromic counter electrode layer which are arranged in a stacked mode, the electrochromic layer is in a color fading state wh